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20 April 2013

LUNA: First Attempt On Eyepiece Projection Recording

As per title, this is my first video on the moon: it was recorded using 15 mm eyepiece projection on my Nikon D5000. The sky was not clear as the moon was shrouded by an intermediate layer of alto-cumulus clouds. As such, this causes effect of "silks" flowing through the image of the moon.

Notice the image detail on the edge of this video is distorted. This is due to chromatic and geometric abberation caused by the lens inside the eyepiece. Other than abberation caused by the multiwavelength nature of moonlight, another cause of seemingly random distortion over the image especially on tiny details of the lunar craters which seems like the moon is soaked in a thin layer of running water (with similarity of looking parallel to a surface of a hot sun-baked road in the afternoon) is caused by the atmospheric thermal changes or air flow that causes changes in refractive indices in upper-atmospheric air.

Under such high magnification, we can only see a part of the moon drifting through the field-of-view. After I "found" the moon on its view, my telescope was let stationary. The moon crosses the field-of-view so swiftly thanks to the rotation of Earth itself.

The image sharpness of this video was post-processed with simple Windows Movie Maker (I have yet to find a software with higher capability in video editing) and the video was turned into grayscale to mask the colour dispersion due to chromatic abberation. The name of the classical music is "The Blue Danube" composed by Johann Strauss II in 1866.

Pastiche to 2001: A Space Odyssey? You bet!

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